I am running into the same issue, unable to connect over wifi or direct connection at work. I created a new user which also did not resolve the issue.
I am able to connect on my home wireless.
I am able to connect if I start up a personal hot spot on my iPhone.
I am not able to connect on our work wireless or using the direct connection to the Alfred server.
I did notice when connecting to our wifi that the cert was out of date and agreed to proceed. Not sure if it would help but I went into the apple keychain and checked that all parameters for the cert were set to trusted. No luck though.